Thornlie, WA 6108 — Suburb Profile
Last reviewed: · By Knowburb Research Team
In short
Thornlie is a large established residential suburb in Perth's south-east, 16km from the CBD in the City of Gosnells, bordered by the Canning River and served by Thornlie railway station. It houses a multicultural population of around 23,700, predominantly families. Housing is mostly separate houses on quarter-acre blocks from 1950s-1980s developments, with median prices reflecting steady demand.
Snapshot
Demographics
- Population
- 23,665
- Median age
- 38 years
- Median household income
- $1,571 /week
- Median personal income
- $682 /week
- Median family income
- $1,825 /week
- Average household size
- 2.7
- Persons per bedroom
- 0.8
- Local government area
- Gosnells
- Statistical region (SA4)
- Perth - South East
- Remoteness classification
- Major Cities of Australia
- Federal electorate
- Burt
Property & cost of living
- Median rent
- $690 /week
- Median monthly mortgage
- $1,625
- Median house price
- $805,000
- Rent share of household income
- 44%
Schools
- Thornlie Senior High School
- Thornlie Primary School
- Forest Crescent Primary School
Transport
- Thornlie line — Thornlie Station
- Route 930 bus to Elizabeth Quay
- Roe Highway
Lifestyle & amenities
Multicultural family suburb developed from the 1950s with estates like Crestwood and Forest Lakes. Key landmarks include Thornlie Square, Forest Lakes Forum shopping centres, and Canning River paths; strong community sports at Tom Bateman Reserve.
- 1 café
- 9 restaurants
- 2 pubs and bars
- 68 parks and reserves
- 5 gyms and fitness centres
- 2 libraries
- 7 supermarkets
- 60 playgrounds
Climate
- Warmest month: Feb (32.1°C avg max)
- Coolest month: Jul (18.0°C avg max)
- Annual rainfall: 755 mm
- Reference station: Perth Airport, 14.8 km away
NBN & connectivity
Fibre to the Premises serves 49.6% of the 9,264 resolvable premises in Thornlie. Most premises here have a fibre cable running directly into the property — the fastest and most reliable NBN option, with plans available up to NBN 1000.
- Fibre to the Premises: 49.6%
- Fibre to the Curb: 38.7%
- Fibre to the Building: 1.1%
- Fibre to the Node: 10.6%
Safety
- Recorded offences: 25,930 across the Armadale District in the year to Mar 2026 (stable on the prior year).
- Most common categories: 8,360 theft, 7,261 violent offences, 2,942 property damage.
Frequently asked questions
What is the population of Thornlie?
Thornlie (WA 6108) had 23,665 residents at the most recent ABS Census. The median age is 38. It sits within the Gosnells local government area.
What is the median rent in Thornlie?
The median advertised rent in Thornlie is $690/week, based on SQM Research listings data. Rents vary by property type, bedrooms and condition.
Are there schools in Thornlie?
Yes — 3 schools are listed within or near Thornlie. Nearest include: Thornlie Senior High School, Thornlie Primary School, Forest Crescent Primary School. School data sourced from ACARA and state education departments.
What NBN technology is available in Thornlie?
Thornlie is predominantly served by Fibre to the Premises (49.6% of premises). Coverage data is sourced from the NBN upgrade map aggregated from NBN Co address checks.
How safe is Thornlie?
Across the surrounding area, 25,930 offences were recorded in the 12 months to Mar 2026. The most common offence categories were theft (8,360), violent (7,261), property damage (2,942). Crime statistics are recorded by area (postcode or LGA), not by individual suburb. Data sourced from each state's crime statistics agency.
What is the climate like in Thornlie?
In Thornlie, mean daily temperatures range from 12.2°C to 24.7°C and annual rainfall is 755 mm measured at the Perth Airport weather station (14.8 km away). Long-term averages from the Bureau of Meteorology.
Sources & methodology
Demographics from ABS Census. Property data from SQM Research. Climate from Bureau of Meteorology. Schools from ACARA. NBN from NBN Co. Amenities from OpenStreetMap. See full methodology.
Additional sources for this profile: